From a8674f753e36f566d6c1d992ab85323d784281d9 Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Sat, 14 Dec 2019 17:53:10 +0200 Subject: [PATCH] ipv4: Notify newly added route if should be offloaded When a route is added, it should only be notified in case it is the first route in the FIB alias list with the given {prefix, prefix length, table ID}. Otherwise, it is not used in the data path and should not be considered by switch drivers. v2: * Convert to use fib_find_alias() instead of fib_find_first_alias() Signed-off-by: Ido Schimmel Reviewed-by: David Ahern Signed-off-by: David S. Miller --- net/ipv4/fib_trie.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 4c80ac0344f4..f56945d00d7a 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1295,6 +1295,16 @@ int fib_table_insert(struct net *net, struct fib_table *tb, if (WARN_ON_ONCE(!l)) goto out_free_new_fa; + if (fib_find_alias(&l->leaf, new_fa->fa_slen, 0, 0, tb->tb_id, true) == + new_fa) { + enum fib_event_type fib_event; + + fib_event = FIB_EVENT_ENTRY_REPLACE_TMP; + err = call_fib_entry_notifiers(net, fib_event, key, plen, + new_fa, extack); + if (err) + goto out_remove_new_fa; + } err = call_fib_entry_notifiers(net, event, key, plen, new_fa, extack); if (err) goto out_remove_new_fa;